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National Water Quality Laboratory

Sunday July 22, 2018

U.S. GEOLOGICAL SURVEY Open-File Report 90-379

A PROTOCOL FOR ONSITE SCREENING OF VOLATILE ORGANIC COMPOUNDS USING A PORTABLE GAS CHROMATOGRAPH

By Robert D. Brock

Onsite screening of volatile organic compounds in water, soil, and vapor matrices using portable gas chromatographs equipped with photoionization detectors has become an increasingly popular technique in hydrologic investigations. To be most effective, the proper equipment is required and the operator needs to be adequately trained. Because of changing environmental conditions, onsite operation of a gas chromatograph requires a rigorous instrumental protocol in order to ensure the quality of data produced. This report describes such a protocol.

 

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